[petsc-users] CMake error in PETSc

[Yingjie Wu]

Hi,
Thank you for your email.

The error in the previous program was indeed due to the missing
"SNESSetFromOptions".
I use the /snes/example/tutorial/ex1.cpp as test case. However, I found
that some of the statements in the program were not compiled and deleted
the statements containing "MPI_Comm_size", but I don't know how to solve
this problem.

lerui at yu1994-ThinkPad-W520:~/tem2/build2$ cmake ..
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
-- Checking for one of the modules 'PETSc'
pkg include dirs:
/home/lerui/petsc-3.12.2/arch-linux2-c-debug/include;/home/lerui/petsc-3.12.2/include
pkg include libs: petsc
pkg ldflags: -L/home/lerui/petsc-3.12.2/arch-linux2-c-debug/lib;-lpetsc
-- Configuring done
-- Generating done
-- Build files have been written to: /home/lerui/tem2/build2
lerui at yu1994-ThinkPad-W520:~/tem2/build2$ make
Scanning dependencies of target main
[ 50%] Building CXX object CMakeFiles/main.dir/ex1.cpp.o
[100%] Linking CXX executable main
/usr/bin/ld: CMakeFiles/main.dir/ex1.cpp.o: undefined reference to symbol
'MPI_Comm_size'
/home/lerui/petsc-3.12.2/arch-linux2-c-debug/lib/libmpi.so.12: error adding
symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
CMakeFiles/main.dir/build.make:94: recipe for target 'main' failed
make[2]: *** [main] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/main.dir/all' failed
make[1]: *** [CMakeFiles/main.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2

Thanks,
Yingjie

Jed Brown <jed at jedbrown.org> 于2019年12月6日周五 上午10:54写道：

> Yingjie Wu <yjwu16 at gmail.com> writes:
>
> > I'm so sorry that I've ignored your previous advices.
> >
> > I added a global variable that seems works:
> >
> >
> > export
> >
> LD_LIBRARY_PATH=/home/lerui/petcs-3.12.2/arch-linux2-c-debug/lib:$LD_LIBRARY_PATH
> >
> >
> > How should I make petsc in a standard position?This eliminates the need
> to
> > set global variables.
>
> You can configure PETSc with --prefix=/your/standard/path, then make
> install.
>
> > It seems that some of the options before running fit become unavailable:
> >
> >
> > mpiexec -n 1 ./example01cmke -snes_view
> >
> >
> > Options-snes _ view are not used and how should I solve this problem?
>
> I don't have your ex1.cpp, but presumably you didn't SNESSetFromOptions?
>
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